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Electrically insulating bearing ring, in particular for a roller bearing

A technology of rolling bearings and bearing rings, applied in the field of bearing rings, can solve the problems of ingress of dirt or moisture, unfavorable heat dissipation of the matrix, and unfavorable heat dissipation.

Inactive Publication Date: 2013-01-02
SCHAEFFLER TECH AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a cover has a negative effect on the heat dissipation of the base body and thus of the bearing as a whole
In addition, dirt or moisture can get into the gap between cover and base body

Method used

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  • Electrically insulating bearing ring, in particular for a roller bearing
  • Electrically insulating bearing ring, in particular for a roller bearing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] figure 1 A bearing ring 1 of a bearing, ie a rolling bearing, in particular a ball bearing, is shown, wherein the body of the bearing ring 1 has a base body 2 made of electrically conductive material, ie rolling bearing steel, and an electrically insulating layer 3 fastened on the base body 2 . The electrically insulating layer 3 has a layer thickness of approximately 100 μm and is therefore considerably thinner than the wall thickness of the base body 2 of the bearing ring 1 . Electrical insulating layer 3 in figure 1 In the illustration of FIG. 1 , the thickening of the outer contour of the cut-out base body 2 is shown and the layer thickness of the electrically insulating layer is shown exaggerated.

[0034] The electrically insulating layer 3 extends as a continuous coating with an approximately constant layer thickness along the side face 4 and the two end faces 5 , 6 of the bearing ring 1 . The electrically insulating layer 3 also covers the edge 7 between the o...

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Abstract

The invention relates to an electrically insulating bearing ring, in particular of a roller bearing, comprising a base body (2) and an electrically insulating layer (3) which is secured to the base body (2). The problem of specifying an electrically insulating bearing ring, in particular of a roller bearing, with an only small layer thickness of the electrically insulating layer, is achieved according to the invention in that the electrically insulating layer (3) comprises a polyamide that the electrically insulating layer (3) has a thickness of approximately 20 micrometres to approximately 200 micrometres and that the electrically insulating layer (3) is securely arranged on the base body (2) by means of an intermediate layer (9).

Description

technical field [0001] The invention relates to an electrically insulating bearing ring according to the preamble of claim 1 , in particular an electrically insulating bearing ring for a rolling bearing, and a bearing according to claim 9 , in particular a rolling bearing. Background technique [0002] It is known from practice that the passage of electric currents through bearings can lead to damage to the bearings. There is therefore a need for electrically insulating bearings, in particular electrically insulating bearing rings. [0003] Ceramic layers are known from the prior art, which are fixedly applied as an electrically insulating layer to a metallic, ie electrically conductive, bearing ring base body. Such ceramic layers are impact sensitive and may easily flake off. Furthermore, ceramic layers are not suitable on thin-walled base bodies or on sharp-edged sections of the base body. [0004] Covering parts are also known from the prior art, in particular injectio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C19/52
CPCF16C19/52F16C33/58F16C2202/30F16C33/586F16C33/62C23C22/12F16C2208/62
Inventor G·马丁X·尼
Owner SCHAEFFLER TECH AG & CO KG